allow decimals as a range boundary (#2509)

tests/shell/pipeline/commands/internal.rs

@@ -502,6 +502,18 @@ fn range_with_open_right() {
     assert_eq!(actual.out, "95");
 }
 
+#[test]
+fn range_with_mixed_types() {
+    let actual = nu!(
+        cwd: ".",
+        r#"
+        echo 1..10.5 | math sum
+        "#
+    );
+
+    assert_eq!(actual.out, "55");
+}
+
 #[test]
 fn it_expansion_of_tables() {
     let actual = nu!(